package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;


    /**
     * 根据id删除时首先判断分类下是否关联了菜品或套餐数据
     * @param id
     */
    @Override
    public void removeByCategoryId(Long id) {
        //查询是否关联了菜品，有则抛出异常
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
        int dishCount = dishService.count(dishLambdaQueryWrapper);
        if (dishCount>0){
            //已经关联菜品，抛出异常
            throw new CustomException("当前分类下关联了菜品信息，不能删除");
        }
        //查询是否关联了套餐，有则抛出异常
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        int setmealCount = setmealService.count(setmealLambdaQueryWrapper);
        if (setmealCount>0){
            //已经关联套餐，抛出异常
            throw new CustomException("当前分类下关联了套餐信息，不能删除");
        }
        //正常删除
        super.removeById(id);

    }
}
